Door-control mechanism



Dec. 6, 1924. 1,519,355

J. A. BRUBAKER noon CONTROL MECHANISM Original Filed Jan. 15, 1921 5 Sheets-Shet 2 ..a gwvent 01;

attozneg J. A. BRUBAKER DOOR CONTROL MECHANI SM Dec. 16, l 924.

Original Filed Jan. 15, 1921 5 Sheets-Sheet LL AM a &mmm;

. Illllll 5 Sheets-Sheet 4` rvuentoz LL A Tuma J. A. BRUBAKER DOOR CONTROL MECHANISM Orgnal Fled Jan 15, 1921 J. A. BRUBAKER DOOR CONTROL MECHANI SM original Filed Jan. 15, 1921 5 Sheets-Sheet attoz nu main Patented Dec. 1924.

` UNITED STATES PATENT OFFICE.

JOHN A. BBUBAKER, OF TOLEDO, OHIO, ASSIGNOR TO THE HAUGHTON ELEVATOR &a

MACHINE CO., OF TOLEDO, OHIO, A GORPORATION OF OHIO.

DOOR-CONTROL MECHANISM.

Application filed January 15, 1921, Serial Ne. 437,476. Renewed September 6, 1924.

To all whom z't may cancer:

Be it known that I, J OHN A. BRUBAKER, a citizen of the United States of America, residing at Toledo, Lucas County Ohio, have invented new and useful Door-Control Mechanisms, of which the following is a specification. e

This invention relates to door or gate handling mechanisms especially for gates or doors at the landings of elevator shafts.

This invention has utility when incorporated in power controlled mechanisms for vertically movable sectional doors to be controlled from an elevator car adjacent the landing carrying the doors.

.Referring to the drawings: v

Fig. 1 is a fragmentary side elevation showing mounting of elevator doors for travel against binding:

Fig. 2 is a plan view of the 1 in an elevator shaft;

Fig. 3 is a fragmentary detail View in plan of the power drive for the doors;

Fig. 4 is a view showing drving and control details of the apparatus for Operating the doors;

Fig. 5 is a side elevation of the main control features as disclosed in Fig. 4;

Fig. 6 is a detail view of the door lock'and associated switch cut-out device;

Fig. 7 is a detail view of the cam controlled switch for limited. up direction travel of the car;

Fig. 8 is a detail view of the cam controlled switch for limited down direction travel of the car; i

Fig. 9 is a wiring diagram of the control power connections for the doors.-

An embodiment of an installation hereunder is shown in Fig. 9 in an elevator shaft 1 having a plurality of landings 2 which may be served by elevator car 3 in the elevator shaft 1. This elevator car 3 has therein a controller 4 from which extends central or line 5 to terminal 6 adjacent contact 7 on rock arm 8 of axis 9. With the gates of the elevator closed at the various landings 2, this contact 7 is in position to close the circut between the terminal 6 and the doors of Fig.

terminal 10 as a switch in the main line 5, while as hereinafter described, if the gatu controller were shifted to eflect gate opening, this would'result in the switch 7 being open. One of' these switches 7 is disposed for each of the several landings having the -a gate control mechanism of this disclosurc. This line ling mechanism extends by line 12 to power supply line 13. In Operating the controller 4, say for up travel of the car 3, this controller 4 -is shifted to contact 14. This con tact' 14 normally has utility in this device in shifting the c'ar 3 to a position adjacent a landng when the gates may not be fully closed. This contact 14 is connected by line 15 which extends to terminal 16 and contact 17 as a switch carried by arm 18 on axis 19. When this contact switch 17 is thrown against terminal 16 with the gates open, it also comes in contact with terminal 20 so this switch 17 between the terminals 16 and 20 permits flow of current by way of line 21 to line 12 and thereby forms a by-pass for current supply 12 from the supply line 13 should the switch 7 be open.

Additional shittin of the controller 4 in the car 3 brings sai controller 4 into contact relation wth the terminal 22 of the line 23 extending past upper final hatch limit switch 24 thence by line 25 to main switch coil 26 of the main switch 27. This throwing of the main switch 27 permits current flow from 'power supply line 28 by line 29 to elevator motor 30. Still further movement of the controller 4 brin s such controller into active relation wit contact 31 ot' line 32 extending past upper final hatch limit switch 33 and thence by line 34 to up direction travel switch coil 35 throwing such up switch 36 so that power current from line 37 may flow by line 38 to this motor 30 and simultaneously power from line 5 from the terminal gate control- 'of s prin so that this main elevator motor rive shaft 44 and throughworm 45 17 will pernitinching or short distance' travelof the car 3 upward'` to a landin position at a floor when the gate is open, t ere is provided a reverse or downward travel throw of the controller 4 by way of 'line 51 extending by way of switch 52 serving as a by-pass similar to the switch 17 but for reverse direction travel or downward direc tion so that the elevator car 3 may be moved toward the floordownward when the gate is open inreachingthe floor landing 2. The

p direction shifting, 4

'tion that the cam-56 full throw of the controller 4 for down di'- rection travel -operates in a similar manner but oppositely to the full throw of the controller for up direction travel. In this down the lines pass thefinal lower hatch limit switch 53 instead of upper final hatch limit switch 33. Herein only the final hatch limit switches are shown, there being omission of the over travel switches, but of course these may be used in the usual manner. The line from the controller 4 goestodown direction switch 54 instead of np direction switch 36 and accordingly operates for reverse travel of the main elevator motor 30. v i When, the car 3 reaches the vicinity of a landng 2,

controller 4 is thrown to neutral or vertical position 'and treadle- 55 in the floor of the car 3 is depressed to 'throw cams 56, 57 and 58, simultaneously into such posiand the cam 57 or'the cam 58 may be in position to coact with rock arms 59 and 60, or 61. The roller carrying arm 61 engaged by cam 57 is on axis 62 having arm 63 carrying switch 52 as a by-pass in' the 'down direction travel control for inching or getting the car 3 toward the floor 2. from below a landing. Correspondingly the roller carrying arm on the shaft 19 is rocked by the cam 58 tothrow the arm 18 to ;close the. switch contact 17 as a by-pass for inching or getting the car toward the landing 2 from above a landing when the gate is open' lVhen thecar 3 is in a region of a landing 2, so that depressing the treadlc 55 will throw the cam 57 into engagement with the roller arm 61 or the cam 58 with rack the switch 7 and in opening this switch 7, contacts'64 and 65 are brought into action. With the switches so thrown, power from the' main supply line 28 may pass by line 66 past terminal 67 and thence by, line68 to terminal 70 and thence by nnv to the switch 64 on the arm 8 and from this contact 64 by way of line 72 to gate Operating motor 7 3 for the gate at such landing 2 as may be determined by the position of the car 3. Power from the line 13 flows from the line 12 and thence by line 74 to terminal 7 5 and then by line 76 to contact 77 and line 78 to the switch 65 on the arm 8 and thence by line 79 to a second phase of the three phase squirrel-cage motor 73 for opening the. gates. The' power for the third supply line to this motorr 73 is` by way ot' line 80from the power supply line 37. Accordingly. the depression ofthetreadle 55 in the car 3 when the car 3 is in 'the' limited range adjacent a ianding '2 as determined bvthe length of the cam 56, operates'automatically 'to start the gate openingmotor 73 for opening the gates. Furthermore; within the range of cams 56 57,' 58. with the gate opening, or open-;the car may be moved from short of or beyond' toward exact landing position. 4 r i The motor 73 operates motor shaft81 having pinion 82 in mesh with gear 83 as a snced rednction train. 'This gear 83 is on shaft 84 carrying pinion %in mesh with 86. This-rack 86 has track 87 which at once. when the rack 86 is shifted toward gate opening position tends' to engage roller carrying arm 88 on sh'aft 89 and therebv holds arm 90 carryingswitches91 and' 92 respectively in position for by-passing switches 64 65. However this by -passing is only partially effected by the switches91 and 92, to complete the circnitit is necessarr to throw snpplementary gate controller 93 in the car 3. This grate controller 93 in the car 3 is not a gate opening device but merelv a gate closing device and for gate closing is held in thrown' position against the. resistance of spring 93' srthat contact. 94 may operate'as a switch between lines 74 and` 95. to switch 91 and thence by line 96 to lin( 72. Switch contact 97 on the ;rate closinfi'controller 93 between the line67` and the line 98 serves on this holding of the controller 93 for closing the gate to supply current by way of the switch 9210 line 99 and thence by the line 79 therebi 'f completing the circuit to 'the gate Operating motor'73 tor closing the states -The car 3 mav'not be started away from the landing until the gatcs are locked against opening.

One of these I installed at each landing and is complete' with an intel-connected control from the con-` trol devices on the' car 3. The rack 86 has `extending'therefrom a bracket 100, monnted gate Operating motors 731:

101. This door 101 has projecting one from each end thereof near the top, a bracket 102 (Fig. 1) connected to flexible cable 103, upwardly extending over fixed idle pulley 104 to connect to lo-wer side ofupper door section 105, similar to door section 101 but oppositely movable as to the door 101, to provide a clear way at a landing 2 from the elevator car 3. By balancing, equalizing or evening the travel of the upper door section 105, the travel of the lower door section 101 is also equalized because the carrying connections between the doors 105 and 101 are bilaterally symmetrical, there being one for each end of the door 101 connected by the lines 103 over the pulleys 104.

This evene-r device comprises flexible connections herein shown embodying fixed bracket 106, a fiexible cable 107 passing therefrom about the under side of the guide 108, thcnce over guide 109, thenee over guide 110 and then downward to fixed bracket 111. These guides 108. 109, 110, are shown as carried near the lower edge of the upper door section 105. Similarly there is oppositely extending from fixed bracket 112 above the bracket 111, a flexible line 113, under guide 110, and under guide 109. over guide 108 and down to a fixed bracket 114 below the bracket 106. Accordingly, as the rack 86 through the bracket 100 operates the lower door section 101 upward or down- Ward, there is transmitted a uniform and even travel to the upper door section 105 and as this door section 105 is equalized in its travel, the evening or straight line travel is transmittted to the brackets 102 of the section 101. Therefore, notwithstanding the door 101 is operated by power from one side, there is a uniforrn straight line travel against binding of the doors or gates in opening or closing.

From the diagrammatic connection showings in Fig. 9, attention is now directed to Fig. 5 which more particularly shows the mechanical details of the mechanism actuated and controlled by the shitting of the larger or main cam 56. This cam 56 when thrust outward by the treadle engagcs roller 115 on the arm 59 to Swing this arm 59 on hearing 116. Extending from this arm 59 below the hearing 116 is extension 117. which. before the cam 56 is thrust against the roller 115. was in position against adjustable stop 118 to which position it was thrown by spring 110 coacting with arm 120 of the angle lever 59. 117. 120. This thrusting of the cam 56 against the roller 116 so rocks the arm 120 downward that cam portion 121 is lowered to inactivo position and cam portion 122 comes into active position as to roller 123 on arm`124 carried by hearing 125. Horizontally extending from the hearing 125 is arm portion 126, normally thrown unward bv sprin 127, thereby holding the roller 123 in position against the cam 122. This movement of the multiple arm lever 59, 117, '120, permits a swing of the arn 126 upward as the arm 124, carrying the roller 123 swings downward. There is a third arm 128 upwardly extending from the hearing 125 of this compound multiple arm angle lever 124, 126, 128. This upwardly extending arm 128 carrics the switches 64, 65, and in this movement closes the contact as to lines 71, 72, and lines 78, 7 9, thereby permitting flow ot current to the gate Operating motor 73.

The thrusting of the roller 115 by the cam 56 operates push rod 129 to swing depending arm 130 on its hearing 131 to open the switch 7 thereby cutting out direct line power to the main feed of the controller 4 and to line 5 from line 12. This occurs simultaneously with the closing ot the switches 64, 65.

The rack 86 carries an adjustable clamp 132 having a pin 133 which may ride in groove 134 carried by vertically extending rock lever 135 mounted on fixed hearing 136 having an arm 137 extending therebelow to be thrust by the cam 134 into engagement. with roller 138 carried by the arm 126. This serves as an automatic cut-out for breaking the electric current supply by way ot' the switches 64, 65, to the gate Operating motor as the gate-101, 105, approaches a full opening position, thereby de-energizing the motor 73 and allowing the completion ot' the gate travel to be a coasting travel in completiug the opening of the gates 101. 105. As heretofore described for closing the gates, the controller 93 on the elevator car 3 is operated to reverse the motor 73 and as the gates move toward closed position the cam 134 operates the lever '135, 137. to clear the roller 138 so that the spring 127 may be effective in closing switches 64. 65. but for the fact that the treadle 55 in th(` car 3, not being depressed, cam 56 is away from the roller 115 and accordingly the arm 59 is rocked outward by spring 119 thereby holding the cam 121 in engagcment with the roller 123 thus precluding an v closing of the switches 64, '65. This automatic switch arrangemcnt is accordinglv in position for a repetition o't this gate opening operation at this landing for reopening or at different landings upon the depression of the treadle 55 in the ear 3.

The by-pass control feature tor etccting shitting ot' the car slightly towards the floor upward is disclosed as to cani 57 in Fig. 8. The depression ot the trcadle 55 in the car 3 when the car 'is slightly above a landing or floor 2 throws this cam 57 against roller 139 on the upwardly extending arm 6 thereby rocking said arm on its hearing 140 to throw depending portion 141 away from adiustable stop 142. This arm is nor- This cam 58 mally thrown toward the cam 57 by spring 143 coacting against horizontally extending arm 144 having cam portions 145, 146. Before the cam 57 is thrust against -the roller 139, the cam o'tion 145 is against roller 147 on arm 148, ut upon the action of the cam 57 against the roller 139, the lowering or downwa'd travel of the arm 144 permits the roller 147 to ride from the cam portion 145 to the cam portion 146, thereby rocking the arm 148 upon hearing '149 as actuated by spring 150 against horizontally extending arm 151 of compound angle lever 148, 151, 18. This means that the swinging of the angle lever 148, 151, 18, is such as to close the switch 17 thereby permitting a by-pass from'the controller 4 on the car' 3 by way of the terminal 14 at the controller 4, to perinit a lifting oi" the car 3 to an extent that the roller 139 may not be efi'ected further than' riding ofl" the cam 57 which should be at the landin for the car. As the roller 139 rides ofl" t e cam 57, opening the switch 17 to open the switch 27, 30 and stop the motor, the car 3 is automatically stopped at the landing 2 even though the controller 4 be not in central position. The car 3 may not be shifted from., the landing 2 until the gate is closed. QSimilarly to the cam action of the cani 57 in bringing the car up to the floor there is a correspondingdevice operated by the cam 58 to brin t e car down to the floor. w en' thrust outward by the treadle on'the car 3, coacts with roller 152 (Fig. 7) on the u wardly extending arm 61 mounted on fixe pivot hearing 153. This arm 61 has de ending portion 154 coacting with adjusta le stop 155. This position' against the stop 155 `'is maintained by spring 156 coacting with arni 157 of compound lever 61, 154, 157. This horizontally extending arm 157 of this lever has lower longer radius cam portion 158 and shorter radius upper cam portion 159. The cam portion 158 is normally in contact with roller of lever mounted on fixed 160 on arm 161 y bear-ing 162 which is normally thrust against cam 158, 159, by spring 163 acting upon horizontally extending arm 164. This compound lever 161, 164, as the by-pass for the controller 4 in bringing the car down to the floor or landing 2. These inchings or short travels of the car 3 with the gates open may only be toward a landing 2.

The by-pass permitting the closing of the gates from the controller 4 in the car is shown in VFig. 6. Laterally extending from the bear-ing 131 is extension 166 with which coacts spring 167 controlling arm 88 with its roller 165 which engages with-the track 87 on the rack 86. Before the gate section 101 starts to lower, due to the action of the cam 56 on the arm 59, the push rod 129 has 63, has the switch 52.

moved the arm 130 and also arm 88 to gate unlocking position shown in Fig. 6. This also actuates the lower or depending ortion 168 inward or toward the rack 86, t us allowing the sprin 169 to thrust upward arm 170 and so roc said arm on bearin 171 that the upwardly extending arm 90 Q this angle lever' 170, 90, is with its switches 92, thrown into switch closing position.` Ac cordingly, at any position of opening of the gates or doors 101, 105, should the motor 73 be stalled or stopped, there may beja closing of the gates by in the car 3.

In the reverse or closing operation of the gates 101, 105, as the cam roller 165 rides ofi' the track 87, the depending arm 168 rocks against the roller 170' to open simultaneous'- ly switches 91, 92, thereby cutting ofi' the power supply to the motor 73, even though the' controller 93 is held in operative or Operating the controller 93 driving relation against the action of the spring 93': the motor'73 occurs just before the gates 101, 105, are fully closed there is anautomatic coasting of the gates 101,' 105, to the fully closed position. When the treadle 55 in the car 3 is not depressed, this travel towards closed position of the gates 101, 105,

through the cam 134 rocks the lever' 135,' I

137, so that the switches 64, 65, may be closed by the depression of the treadle 55 for immediately reopening the gate, if such course is desired. e

h As this swinging of the lever 88 toward t e lock notch '172 comes into engagement or rack 86 'as actuated by the spring 167,

under the rack 86 precluding any opening of the door which is not Contmplated. As the door coasts therefrom into its fully closed position, ment with the rack 86 and thereby holds the doors fully closed. When the notch 172 is in gate holding position the arm 168 is rocked so far that the spring contacts of the switch 7 are closed and thus as the gate is locked against opening wider, the-car 3 may be started away froni the landing 2 before the gte is fully closed or locked by the notch 1 3. v

In this disclosure as above set forth, there is provided a separate gate 'machine for each landing door'ot the Vertically movable sectional type, which door is automatically locked, at once the car is away from the landing or adjacent the landing, there being special provision for etfecting an accurate landing with the car partly above or below the landing. -These are features of desirability in safe operation nipulation in eifectingthe desired landings, especially in freight or heavy Operations.

What is claimed and it is desired to secure' by Letters Patent is: p

1. A controller for an elevator gate comand easy ma- As this autonatic cutting out of A notch 173 comes into engageprising a lock for precluding opening of the gate, a car, lock releasing means operable from the car, mechanism precluding effectiveness of the lock releasing means except in a limited range adjacent a landing, and a motor for opening the unlocked gate, said motor being cut out by the mechanism until the gate is unlocked.

2. A controller for an elevator gate comprising a lock for precluding open ng of the gate, a car, lock releasing means operable from the car, mechanism precluding efiectiveness of the lock releasing means except in a limited range adjacent a landing, and means for Operating the gate connected to be set into operation by the lock releasing means.

3. A controller :tor an elevator gate comprising a lock for precluding opening of the ate, a car, lock releasing means o erable from e car,mechanism prec udinge ectiveness of the lock releasing means except in a limited range adjacent a landing, a power drive 'for the elevator, and drive effective as operative.

4. A- controller for an elevator gate comprising a lock for the gate, a car, lock releasing means operable from the car, mechanism precluding efiectiveness of the lock releasing means except in a limited range adjacent a landing, a power drive for the elevator, a cut-out for the elevator drive eflective as the lock releasingmeans is operable, and a by-pass for the elevator drive cut-out, said by-pass being thrown into action by the'lock releasing means.

5. A controller for an elevator gate comprising a lock for the gate, a car, lock releasing means operable from the car, mechanism precluding effectiveness of the lock releasing means except in a limited range adjacent a landing, a power drive for the elevator, a cut-out for the elevator drive effective as the lock releasing means is operable, a by-pass for the elevator drive cutthe lock releasing means s out, said by-pass being thrown into action by the lock releasing means, and a car travel cut-out for the by-pass.

6. An elevator shait having landings, an elevator car in said shaft, a power drive for the car, a gate at a landing, a power drive device for opening the gate, said car traveling as to said drive device, a controller operable from the car for setting into operation a gate opening drive device, and connections from said controller independently of the gate for cutting out the elevator drive. v

7. An elevator shaft having landings, an elevator car in said shaft, a power drive for' the car, 'a gate at 'a landing, a power drive device for opening the gate, said car traveling as to said drive device,- a controller operable from the `car for setting into operation a gate opening device, cona cut-out for the elevator nections from said controller for cutting out the elevator drive, and automatic cut-out means 'for the gate drive device as the gate approaches a fully opened position to permit the gate to coast therefrom to fully open position.

8. An elevator shaft having landings, an elevator car 'in said shai't, a power drive for the car, a gate at a landing, a ower drive device for opening the gate, said car traveling as' to said drive device, a controller operable from the car for setting into operation a gate opening device, connections from said controller for cutting out the elevator drive, and automatic cutout means for the gate drive device as the gate approaches a fully closed position to permit coasting close' 9. A gate, a power drive for opening the gate, a controller for setting said drive into operation, a cut-out for the drive at fully opened position, a gat-e closing by-pass being automatically set as the gates start to open, and a second controller for closing the gates through said by-pass means.

10. An elevator shaft having a landing, an elevator car, an electric motor for driving the car', elevator gates at said landing, an electric motor drive for the gates, a 'controller on the car for the car motor, and a controller 'on the car for the gates, said gate controller effective only in` the region of the landing and as operable rendering the car motor controller ineective independently of the gate Shifting.

11. An elevator shaft having a landing, an elevator car, an electric motor for driving the car, elevator gates at said landing, an electric motor drive for the gates, a controller on the car for the car motor, and a controller on the car for the gates, said gate controller efiective only in the .region of the landing and comprising switch throwing means for cutting out the car motor as the gate motor is thrown in.

12. An elevator shaft having a landing, an elevator car, an electric motor for driving the car, elevator gates at said landing, an electric motor drive for the gates, a controller 'on the car for the car motor, a controller on the car for the gates, said gate controller effective only in the region of the landing and comprising. switch throwing means for cutting out the car motor as the gate motor is thrown in, and a by-pass for the cut out for the elevator motor effective as the car is above the floor to permit controller operation of the car motor to bring the car to the floor.

13. An elevator shaft having a landing, 1

an elevator car, an electric motor for driving'the car, elevator gates at said landing, an electrc motor drive for the gates, a controller on the car for the car motor, a controller on the car for the gates, said gate means for cutting out the car motor as the gate motor is thrown in and a by-pass for the cut out for the-elevator motor effective as the car is below` the floor' to permit controller operation of the motor to bring the car to the floor.

14. An elevator shaft having a landing,- an elevator car, an electric motor for driving the car, elevator gates at said landing, anelectric motor drive for the gates, a controller on the car for the car motor, and a'- controller on the car for the gates, said gate controller efl`ective' only in the region\ of the landing 'and comprising cam means thrown from the car and gate switches operable 'by the cam means and as operable rendering the car motor controller inefi'eci tive independently of the gate shifting.

15. An elevator shaft having a landing, an elevator car, an electric motor for driving the' car, elevator an electric motor drive for the gates, a controller on the car for I controller on the car for the gates, said gate controller efl'ective only in the region of the landing and comprising mechanisms thrown from the car, cut out, and by-pass switches for the car motor' coacting with said means.

16. An elevator an elevator car, an electric 'motor for driving the car, 'elevator gates at said landing,

4 an electric motor drive for the gates, a controller on the car for the car motor, and a controller on the car for the gates, said gate controller efiective only in the region of the landin and comprising cam means thrown from t e car, gate switches operable by the cam means for controlling the gates, cut-out,

and by-pass switches for the car motor also operable from the cam means.

17. A vertically shiftable elevator gate, parallel guiding and directing means for opposite vertical' edges of the gate, and power means for shifting the gate to engage one only vertical side of the gate.

18.` A vertically shiftable sectional, ele-. vator gate connected at the ends of each lower section, actuating means for shifting the gate by engagin one only vertical side of a gate section, an evening means for the upper gate section coacting independently ot' the lower gate section. e

19. Anevener device for the upper sectionof a vertical door, comprising guides carredby the door u per section, anchora ing means above an below on op ositeedges of the door lower secton, an two flexible means between the anchoring means y and extending oppositely about the guides on the upper door section;

20. An elevator car, a gate to the car, a power drive for the car, and a lock for the gates at said. landing the' car motor, 'and a' shaft having a landing,

gate cutting 'out the power drive when the gate s open, said lock includin meansmovj able when the gate is nearly c osed to hold the gate from further opening and connecting the power drive to permit .the power drive to be effective in starting the car` forlimited travel of the'car. v

21. An elevator car, an elevator shaft for: the car, said shaft'having a landing, a gate for the landing, a ower drive for-the car, a power drive for t e gate, and a lock precluding operation of the gate drive except with the car adjacent a landing said lock including 'means shiftable independently of the gate to preclude tion of the car' except as' the gate is c or is held against opening beyond a limited extent. v

23. An elevator shaft having landings,

an elevator *car movable in said shaft to different landings, landing gates -at the respective landings, controllers for said landing gates, eachcomprising' a lock precludng opening of its gate, mechanism precludng disturbance 'of efiectiveness of the lock from the car except in a limited range adjacent the landing having thegate to be opened to permit a wayfrom the landing to the car, andmeans 'operable from the car in said limited range for such landing in releasing said lock and thereafter effecting operation of such landing gate, and embodying an electric motor for Operating such landing gate.

24. A controller for an elevator gate comprising a lock for precludng opening of the gate, a car, lock, releasing means operable from the car, meehanism precludng efl'ectiveness of the lock releasing means except 'ina limited rangeadjacent a landing, a

power drive for the elevator, a cut-out. for

the elevator ,drive effective as the lock re leasin means is operative, and meansfor operatn the gate including an electricmotor in a dition to the power drive for the elevator. a i v 25. An elevator shaft having a lurality of landings, an elevator car in sai shaft, a power drive for shifting the'car between the andings, a first controller :for` said' drive,

car power driveoperw. osed' 22. An elevator shaft having landins, an

ifl'er- 85 ing gates at the respective landa gates at said landings, electric motors for sitioned by the first controller, and connecoperating said gates, there being one motor tions from said second controller for renfor the gate at each landng and said car del-ing the first controller ineflect've. 1

travelng as to szd gate 0 emtng motors, In testimony whereof I afiix my signaa second controller operab e from the car ture.

for setting into operation a gate Operating motor at a landng at which the car is po- JOHN A. BRUBAKER. 

